Wife complains that clothes are still sopping wet. I check it and it's shutting off mid cycle. No strange noises, it just shuts off on its own mid cycle. When running self test, F20 code is stored multiple times. Enters test fine, fills, agitates, then machine just hums/buzzes moderately loudly for 5 minutes or so before draining and then shutting off with no additional codes or lights. I've repeated this 3 times with the same results every time. Rinse/drain/spin cycle is the only cycle I can get the machine to complete and it does all the steps fine: filling, agitating both ways, low and high speed spin and drain are all working as they should. What gives?!?